Alcohol, oxycodone and benzodiacepines interactions

How much Xanax and Oxycontin would be fatal when consumed together with alcohol and how much alcohol would cause problems? I know that drinking increases it greatly but I want to know if I can at least have a few, or does it all depend on height and weight?

Benzodiacepines (Xanax) are rarely mortal in overdose because they produce no respiratory depression. Alcohol and oxycodone can produce respiratory depression and combination of both and benzodiacepines, also. It is very difficult to exactly know what is the dangerous dosage of the combination (as there are three different drugs and factors as weight or tolerance should also be considered). Probably, combination of low dosages of benzodiacepines and oxycodone does not increase significantly the risk of death, but umconfortable adverse effects (as amnesia) are very likely.